Additionally if you happen to're having an outbreak then take heed to the L-Arginine to L-Lysine ratio in your diet you can look on-line for charts with the ratio of L-Lysine to L-Arginine in several foods. I do know that I've not had a chilly sore since taking these. I've been taking a special lysine product (a thousand Legal mg every day). This is THE ONE lysine product I use regularly